## can Maple solve bessel function by itself?...

can Maple solve bessel function by itself?

Or it seems i need to work out the solving process on myown?

my function is just like this, a simple one

best regards

memdream

by: Maple

## how do I define a variable and a same variable na...

hello

as described in the title

what i want to define are these

but i get this

as the result of expression of

I wonder what I should do to get this?

i.e define them at the same time.

best regards,

Memdream.

## how can i delete of zeros in my solution in maple...

in my solution is 0.0000 . how can show it 0 and how can i show the solutions for example 10^-30 to zero(round to zero)

1.mw

## Inset figure in Maple...

Dear Maple users,

Is it possible to draw a portion of the figure on the figure it self (Inset) In maple? Below is an example pic:

Thanks,

## how can I display long equations or configure mapl...

how can I print my equation or configure maple so that they don't try to autofit themselves in the window? and what would the best way to export them to MATLAB be? I know there's the codegeneration command.

For example, I noticed that the output of some commands like StateSpace prints the equations in a way that if they are too long, they won't try tu fit, but rather it lets you scroll to the right:

## How to 3d plot 3 variables ...

I have the following inequalty

, assuming all of the variables are positive.

How could I make a 3d plot with three axes for Г, K and N for example?

## Duhamel's integral ...

i solve a dynamic problem but i get wrong answer. F (load) after 0.02 then to zero but d (displaciment) not go to zero

New_Microsoft_Excel_Worksheet1.xlsx

## how to guess the variables?...

A. how to find xx1,xx2,xx3,yy1,yy2,yy3 that
Determinant(Matrix([[xx1,yy1,1],[xx2,yy2,1],[xx3,yy3,1]])) =(1/2)*aa*d*s*u+(1/2)*aa*d*s*a*t+(1/2)*d*v*u*t+(1/4)*d*v*a*t^2;

B. how to find x1,x2,x3,x4,y1,y2,y3,y4 that expand(
(x2 - x1)*(y4 - y3) - (y2 - y1)*(x4 - x3)) = (1/2)*d*s*aa*v+(1/2)*d*aa*v*u*t+(1/4)*d*aa*v*a*t^2+(1/2)*aa*d*s*u+(1/2)*aa*d*s*a*t+(1/2)*d*u^2*t+(3/4)*d*u*a*t^2+(1/4)*d*a^2*t^3;

## How to substitute algebraic variables and function...

I have a set of 15 equations in state space form, and I'm just trying to program a way to substitute all variables representing the time derivates as for example x__s_dot (t) as diff(x__s (t), t)  and diff( x__s_dot (t),t) as diff(x__s (t), t,t) so I can manipulate my equations easier.

The last half of the list xx has the variables that I want to substitute, the x,y and u (with respective diff(x__s (t), t) ) variables are always constant, but in the case of zeta, eta and u I might have indexes from 1 to n , in this case just 1 and 2.

I tried a bunch of methods including creating vectors with the seq, op commands and substituting them into my original equations with subs, algsubs but none of the things I programmed worked the way I wanted, I ended up with a very inefficient way , doing it manually, but the point is that I wanted to automate this bit. I've been doing maple for about 2 weeks and I still struggle a lot with it, I would greatly appreciate any guidence/advice.

My original equations are actually much bigger and my original code too, I tried to shorten it a bit just for making my problem simpler to understand but the equations still look really big here, If there is another way to format this question please do advice so.

EDIT : I think my last code was hard to understand because my equations were too big and it looked all messy and horrible, I edited to show just one vector of variables, I think that if it works here, it should work on the rest of my code:

 > interface(rtablesize=50):
 >
 > nq := 15;             xxUNDOT := [ seq ( xx[i], i = 1..nq),              seq ( diff(xx[i],t), i = 1..nq)];
 (1)
 > DOTL := [ seq ( xx[i], i = 1..nops(xx)) ]: DOTR := [ seq ( xxUNDOT[i], i = 1..nops(xx))]: Vector[column](DOTL),Vector[column](DOTR); for i from nq+1 to nops(xx) do newxx    := subs[inplace][eval](   op(i,DOTL) = op(i,DOTR) ,xx): end do:
 (2)
 > Vector[column](newxx);
 (3)

I tried to make a for loop that substitutes each variable one by one, but it only seems to work for the last term, I don't know why, please help or suggest another method? I also have diff(x__s,t,t) terms in my equations, not just diff(x__s,t), but I guess only by specifying the first derivate it should work?

Thanks.

## how can i solve coupled differential of equation...

how can i solve coupled differential of equation with rkf or another method

maple.mw

A1 , A2, A3 ??

## can this be a solution set?...

v=u+at                      (1)
s=u*t+1/2*a*t^2        (2)

below 3 equations, can substitute  (1)  into it to form (2)
s=1/2*(u+v)*t       (3)
v^2=u^2+2*a*s    (4)
s=v*t-1/2*a*t^2    (5)

can these 5 equations be considered as a solution set of solve function?

or

is only first 2 equations be a solution set?

if so, number of equations less than 5 variables, is there something missing?

## how to dsolve of a equation ...

i want to dsolve frome this equation . but i cant

1.mw

 >
 (1)
 >
 (2)
 >
 (3)
 >
 (4)
 >

## Copying texts to the clipboard...

Hello,

Is there a Maple command for copying a text to the clipboard ? (Apart from using the contextual menu or the Edit-Copy menu option)

For example:

ee := x^2+y^2+z^2

CopyToClipboard( convert(ee,string) )

Thank you,